Android出现奇怪问题，程序可以编译但无法正常工作

Question

In my android project, I have a simple Java file which gets webpage content, does something with the text and returns text as a String . This text I display in a ScrollView in another activity on Android.

It works fine, but the problem comes when I try manipulating the text in this Java file. I tried with arrays, it didn't work then switched back to String , still nothing. It is just a particular method which fails to provide any output but the program compiles fine.

However, the same method when tried in a Java project in Eclipse works perfectly fine.

Here's my code:

// This method will return selected stripped text extracted from rawData
public static String FillMenus(String rawData){
    String resulT = "";
    int c1, c2;
    for(int i=0; i<11; i++){ 
        c1 = rawData.indexOf("\" width=\"50px\" />") + 17;
        c2 = rawData.indexOf(" €</td>") + 2;

        if (c1==16 || c2==1) break;
        if (c1<=c2){
            resulT = resulT+"\n"+ rawData.substring(c1, c2); 
            rawData = rawData.substring(c2);
        }
        if (c1>c2){ 
            resulT = resulT+"\n"+StripTag((rawData.substring(0, c2))); 
            rawData = rawData.substring(c2);
        }
    } 
    return resulT;
}

If there is nothing wrong with this method, then why does it not provide any output? If I return rawData in Android, the phone displays everything properly. If I return the output result String , it is all blank in the phone.

If I call this method (say created in class ABC ) in another test class (test.java) inside the same Android project say with String a = ABC.FillMenus(String b) there is something strange. I get a compiler error, while it shows blank in Android phone. And the same thing called from within a Java project works absolutely fine.

Is there something I'm missing?

Answer 1

A few things

1) what is you for loop for ?

2) if (c1<=c2) and if (c1>c2) are exclusive so I would recommend to change if (c1>c2) to else (helps in the future when you want to change your code)

3) you should init result to null more than "", it will help you test at the exit of FillMenu to know when your code was skipped or when there is no values.

now my guess is that for some reason if (c1==16 || c2==1) break; is triggered and therefore resultT is never changed hence exists empty.

you should run this code in debug and put a break point in it, monitor particularly the values of c1 c2

a part form that I don't think there is enough info to help you more

Jason